Image doesn't show up on the Lumia

I implemented a Xamarin App with UWP Platform as target. I added 4 images in the Assets of PCL and set Build Action = Embedded Resource on each. No image has been added on UWP project.

If I run the app on my laptop everything works great, instead when I run the same app on my Lumia no image shows up. I don't understand why, since the app is the same with the only difference of Target Platform, x64/x86 for my laptop and ARM for my Lumia.

I have also tried to set Copy to output Directory = Copy Always for each image, but without success.